Minebea Company, Limited

Takanobu Koyama

Masahiro Kobayashi

Shinichi Yoshida

Hiroyuki Kujirai

Nao Aoki

Naofumi Kumagai

Yoshikazu Saka

An electromagnetic clutch comprises a rotor rotatable with respect to the center of rotation, an armature facing the rotor with a clearance, a device for generating a magnetic attracting force between the rotor and the armature, a rotating member transmitting a driving force from the armature, and a plate spring for mounting the armature on the rotating member. The plate spring extends in a direction opposite to the center of rotation and has a first end separated from the center of rotation. The first end or a portion in the vicinity of the first end contacts an armature surface facing the rotor, and the plate spring is fixed to the rotating member at a portion other than the portion contacting the armature surface. The armature is supported such that the armature is urged to be separated in a direction opposite to the rotor by an elasticity of the plate spring.

Electromagnetic clutch

A variable reluctance resolver has a rotor which includes a noncircular core and which is rotatably supported inside a stator with a gap therebetween. The shape of the rotor is such that the gap permeance, which is based on the gap, varies according to a sine function of the rotational angle. Each of the salient poles of the rotor has an outer periphery comprising an arc of radius r centered on a point which is offset from the center of the rotor by a prescribed offset distance. The outer periphery of each salient pole does not extend to the inner periphery of the stator.

Variable reluctance resolver

A stator core is surrounded by a first insulating member and a second insulating member . Locking protrusions are formed on the outer periphery of the stator core , and the locking protrusions form a keyway . A modular connector includes a key part that fits within the keyway to secure the modular connector to the stator core . Fastening pins are embedded in the modular connector to conduct electricity from a mating connector and a lead line to the resolver.

Growing community of inventors

Tokyo, Japan

Takanobu Koyama